Fix BaseFeature serialisation behaviour regression

[LachlanMcKee]

The BaseFeature has a regression related to ordering when using a PostProcessor.

The behaviour previously (which is potentially a bug) would cause the PostProcessor to change the order of news events.

This change should be reverted (to avoid bugs), but also made configurable if that is the desired behaviour.

[LachlanMcKee]

After further investigation it turns out that this regression actually fixed an outstanding bug in MVICore. However for now until we update to a later version of Kotlin (due to the approach I will take to approach this fix), I will revert the change.

If you use a featureScheduler the behaviour change will be introduced, so it is a 'gotcha' for now. I will raise a new PR in the following days to make this behaviour fix opt-in